auth: db transaction drain into cached map lookups

[EisigesEis]

• Replace: load all api keys from db > hash > constant time check all keys on each request
• Rename: auth.ts > authuser.ts, apikeys.ts > authgameserver.ts
  • Initial key drain wrapped in db transaction
• Add: apikeycache.ts
  • Cache.refresh() Initial drain loads all hashed keys into memory buffer
  • Cache.get(key) .has(key): On each user request: hash > Map lookup

[EisigesEis]

Fine to sit there for a while or just act as inspiration :)

Should be more performance on each server response. Downsides:

• We lost timing safe compare (could restore that tho)
• We keep the map in cache at all times. Will not be ideal for high player count. Maybe need something with heartbeats and live/cold storage later.